日本下中新世早期鳍足类动物（哺乳动物：食肉目）的Tarsals及其在北太平洋西部的早期多样性

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Paleontological Research Pub Date : 2022-07-01 DOI:10.2517/PR200030

Wataru Tonomori, H. Taru

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引用次数: 0

摘要

摘要日本三重县下中新世（Burdigalian）Oi组鳍足类化石的新跗骨（黄芪和内楔形），属于早期鳍足类动物（即依那拉汀类或基底odobenids），参见Odobenidae gen.et sp.indet。被发现。对早期鳍足类动物Astralali的比较最终表明，在中新世早期（Burdigalian），北太平洋西部至少有三个物种。中新世早期，北太平洋东部的早期鳍足类动物明显表现出相当大的多样性，我们的研究表明，北太平洋西部的早期鳍鳍足类也在同一时间开始多样化。

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Tarsals of Early Pinnipedimorphs (Mammalia: Carnivora) from the Lower Miocene, Japan, and Their Early Diversity in the Western North Pacific

Abstract. New tarsals (astragalus and entocuneiform) of fossil pinnipeds from the lower Miocene (Burdigalian) Oi Formation in Mie Prefecture, Japan, belonging to early pinnipedimorphs (i.e., enaliarctines or basal odobenids) and cf. Odobenidae gen. et sp. indet. were discovered. A comparison of early pinnipedimorph astragali conclusively indicated that at least three species were represented in the western North Pacific during the early Miocene (Burdigalian). Early pinnipedimorphs clearly showed considerable diversification in the eastern North Pacific during the early Miocene, and our study demonstrates that the early pinnipedimorphs in the western North Pacific also started to diversify around the same time.

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来源期刊

Paleontological Research PALEONTOLOGY-

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Paleonotological Research (PR) is a quarterly, peer-reviewed international journal, which focuses on original contributions primarily in the area of paleontology but also covering a wide range of allied sciences. It has been published since 1997 as a successor to the former journal Transactions and Proceedings of the Palaeontological Society of Japan. The emphasis of contributions will include global and local perspectives, and contents can cover all ages (Precambrian to the Quaternary, including the present time).